package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 营业额统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从begin到end范围内的每天的日期
        List<LocalDate> dates = new ArrayList<>();

        dates.add(begin);

        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dates.add(begin);
        }

        String dateList = StringUtils.join(dates, ",");

        ArrayList<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dates) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            HashMap<Object, Object> map = new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status",Orders.COMPLETED);
            Double turnover = orderMapper.sumMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }

        String turnoverString = StringUtils.join(turnoverList, ",");

        return TurnoverReportVO
                .builder()
                .dateList(dateList)
                .turnoverList(turnoverString)
                .build();
    }

    /**
     * 用户数据统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //存放从begin到end范围内的每天的日期
        List<LocalDate> dates = new ArrayList<>();

        dates.add(begin);

        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dates.add(begin);
        }

        List<Integer> newUserList = new ArrayList<>();
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate date : dates) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("end",endTime);

            Integer totalUser = userMapper.countByMap(map);

            map.put("begin",beginTime);

            Integer newUser = userMapper.countByMap(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }

        return UserReportVO.builder()
                .dateList(StringUtils.join(dates, ",")
                ).newUserList(StringUtils.join(newUserList, ",")
                ).totalUserList(StringUtils.join(totalUserList, ",")
                ).build();
    }

    /**
     * 订单数据统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //存放从begin到end范围内的每天的日期
        List<LocalDate> dates = new ArrayList<>();

        dates.add(begin);

        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dates.add(begin);
        }

        List<Integer> orderCountList = new ArrayList<>();
        List<Integer> validOrderCountList = new ArrayList<>();

        for (LocalDate date : dates) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Integer orderCount = getOrderCount(beginTime, endTime,null);
            Integer validOrderCount = getOrderCount(beginTime, endTime,Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);

        }

        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        Integer ValidOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();

        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0){
            orderCompletionRate = ValidOrderCount.doubleValue() / totalOrderCount.doubleValue();
        }

        return OrderReportVO.builder()
                .dateList(StringUtils.join(dates, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(ValidOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);
        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");

        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    /**
     * 导出营业数据
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        //查询数据库，获取营业数据 -- 查询最近30天的运营数据
        LocalDate beginTime = LocalDate.now().minusDays(30);
        LocalDate endTime = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(beginTime, LocalTime.MIN), LocalDateTime.of(endTime, LocalTime.MAX));

        //通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            XSSFWorkbook excel = new XSSFWorkbook(in);

            XSSFSheet sheet = excel.getSheet("Sheet1");

            sheet.getRow(1).getCell(1).setCellValue("时间："+beginTime+"至"+endTime);


            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());

            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());

            for (int i = 0; i < 30; i++) {
                LocalDate date = beginTime.plusDays(i);
                BusinessDataVO businessData1 = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData1.getTurnover());
                row.getCell(3).setCellValue(businessData1.getValidOrderCount());
                row.getCell(4).setCellValue(businessData1.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData1.getUnitPrice());
                row.getCell(6).setCellValue(businessData1.getNewUsers());
            }

            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

        }catch (IOException e){
            e.printStackTrace();
        }

    }

    private Integer getOrderCount(LocalDateTime beginTime, LocalDateTime endTime, Integer status) {
        Map map = new HashMap();
        map.put("begin",beginTime);
        map.put("end",endTime);
        map.put("status",status);
        Integer orderCount = orderMapper.countByMap(map);
        return orderCount;
    }
}
